| 1. | Measurement of l - shell ionization cross sections for silver by electron impact
壳层电离截面的测量 |
| 2. | Electron impact ion source ; ei source
电子轰击离子源 |
| 3. | Electron impact ionization ei
电子轰击离子化 |
| 4. | Electron impact desorption ei
电子轰击解吸 |
| 5. | Electron impact source , ei
电子轰击离子源 |
| 6. | Electron impact mass spectra of heterocyclic derivatives bearing 1 - aryl - 5 - methyl - 1 , 2 , 3 - triazole
三唑的杂环衍生物的电子轰击质谱 |
| 7. | Standard practice for oil spill source identification by gas chromatography and positive ion electron impact low resolution mass spectrometry
用气相色谱法和正离子电子冲击低分辨率质谱法识别溢油源的标准实施规程 |
| 8. | Aurora is the highest level of the earth ' s atmospheric gas molecules or atoms from the sun by the high - energy electron impact after the launch
极光是地球大气高层的气体分子或原子受来自太阳的高能电子碰撞后发射的。 |
| 9. | Standard guide for identification and quantitation of organic compounds in water by combined gas chromatography and electron impact mass spectrometry
用气相色谱与电子冲击光谱方法鉴别和定量测量水中有机化合物的标准实施规程 |
